Guide TU435LS Thermal Scope with LRF With Quick Release Scope Mount

The Guide TU435LS Thermal Scope with LRF combines high-sensitivity thermal imaging, integrated laser rangefinding and long-range detection in a rugged optic designed for demanding field use.

Featuring a 400×300 12μm thermal sensor with 15mK NETD thermal sensitivity, the TU435LS delivers detailed thermal imagery across challenging environmental conditions. Its 35mm objective lens provides a detection range of up to 1800 metres, while the built-in 1200m laser rangefinder delivers fast and accurate distance measurement directly through the scope.

Guide's ApexVision S1 image processing architecture and Hyper-Light algorithm work together to enhance contrast, clarity and fine detail, while Shutterless 3.0 technology provides smoother viewing with minimal interruption.

A large 1.03-inch 2560×2560 AMOLED display, 4.2×–16.8× magnification, up to 14 hours of battery operation, Wi-Fi connectivity and an IP68 protection rating complete a feature-rich thermal optic for longer-range observation.

Includes quick-release scope mount.

ApexVision S1 Image Processing

The TU435LS features Guide's ApexVision S1 image processing architecture, developed to enhance thermal image clarity, detail and overall viewing performance.

Advanced processing works alongside the thermal detector to improve image definition and contrast while reducing unwanted noise.

This helps users retain useful detail around heat signatures and surrounding terrain when observing in darkness, poor visibility or low thermal-contrast conditions.

400×300 12μm Thermal Sensor

At the heart of the Guide TU435LS is a 400×300 thermal detector with a 12μm pixel pitch.

Combined with 15mK NETD thermal sensitivity, the sensor is capable of detecting subtle temperature differences within a scene, helping produce detailed thermal imagery across changing environmental conditions.

A 50Hz frame rate provides smooth image performance while scanning or observing moving subjects.

35mm Lens & 1800m Detection Range

The TU435LS features a 35mm objective lens, providing strong performance for medium- and longer-range observation.

Paired with the 400×300 thermal detector, the optical system provides a stated detection range of up to 1800 metres.

Its 4.2× base magnification provides a closer initial view of distant subjects, while magnification can be increased up to 16.8× when additional detail is required.

Integrated 1200m In-Lens Laser Rangefinder

A standout feature of the TU435LS is its 1200m laser rangefinder integrated directly into the objective lens assembly.

Positioning the LRF close to the optical axis helps minimise parallax between the ranging system and the viewed image, while also keeping the overall design more streamlined.

The integrated rangefinder allows users to observe a thermal signature and measure its distance through the same device, eliminating the need to switch to a separate handheld rangefinder.

1.03" 2560×2560 AMOLED Display

The Guide TU435LS features a large 1.03-inch AMOLED display with 2560×2560 resolution, providing a highly detailed and immersive viewing experience.

The high-resolution display complements the thermal detector and ApexVision processing system, helping present fine thermal detail clearly during extended observation.

Available colour palettes include White Hot, Black Hot, Red Hot, Green Hot, Iron Red, Blue Hot and Sepia.

A -5 to +5 diopter adjustment allows the viewing system to be fine-tuned for individual eyesight requirements.

Hyper-Light Image Processing

Guide's Hyper-Light algorithm works alongside ApexVision S1 to enhance contrast, reduce image noise and improve finer thermal detail.

This processing is designed to provide a clearer and more defined thermal image, particularly when environmental conditions make thermal contrast more difficult to distinguish.

Shutterless 3.0 Technology

The TU435LS incorporates Guide Shutterless 3.0 technology, designed to minimise image freezing and audible clicking during conventional thermal calibration cycles.

This provides smoother, more continuous viewing during normal operation.

A shutter module is retained for startup calibration and operation under extreme temperature conditions to help maintain image quality.

Dual-Battery System

The TU435LS uses a multi-battery configuration consisting of two built-in 18650 batteries and one external replaceable 18650 battery.

Together, the system provides up to 14 hours of operating time, making the scope suitable for extended periods of use in the field.

The external battery can be replaced when required, while USB-C charging and USB 2.0 connectivity provide convenient power and data access.

Ergonomic Controls

The TU435LS features an intuitive control layout designed around easy access to focus, zoom and commonly used functions.

The control arrangement allows adjustments to be made quickly while maintaining a stable and comfortable operating position.

Video, Audio & Wi-Fi Connectivity

The Guide TU435LS supports video and audio recording, allowing thermal observations to be captured directly through the scope.

Built-in Wi-Fi connectivity provides wireless access to compatible external devices for supported viewing, sharing and device functions.

IP68 Weather Protection

With an IP68 protection rating, the TU435LS is designed for use in demanding outdoor environments where exposure to dust, water and changing weather conditions may occur.

Its specified operating temperature range of -20°C to 50°C provides reliable performance across a broad range of environments.

Quick-Release Scope Mount Included

The Guide TU435LS includes a quick-release scope mount, providing a convenient mounting solution straight out of the box.

Quick-release mount scope tube torque: less than 2.5N·m / 22.13 in-lb.

Guide TU435LS Specifications

Why Choose the Guide TU435LS?

The Guide TU435LS Thermal Scope with LRF is designed for users who want integrated ranging and longer-range thermal observation in a single optic.

Its 400×300 12μm thermal sensor, 15mK NETD sensitivity, 35mm lens and 1800m detection range provide capable thermal performance, while the built-in 1200m in-lens laser rangefinder adds precise distance measurement without requiring a separate device.

The large 1.03-inch 2560×2560 AMOLED display provides a highly detailed viewing experience, while ApexVision S1 processing, Hyper-Light image enhancement, Shutterless 3.0 technology, up to 14 hours of battery runtime, Wi-Fi connectivity, recording functionality, IP68 protection and an included quick-release mount complete a powerful thermal platform.